Playback failed

I am trying to use quasar and cast a way but I run into playback problems.
My last error logs read as follows.
08:05:40.616 T:139794207807872 ERROR: Control 55 in window 10001 has been asked to focus, but it can’t

Error: CGUIMediaWindow::GetDirectory(plugin://)failed
Error: GetDirectory- Error getting plugin://
Error: Unable to find plugin

How do I fix this?